What are 7 key events that happen in the adventures of huckleberry finn?

Ive having a little trouble understanding, but what are some key events that happen up to chapter 25. ?

http://www.sparknotes.com/lit/huckfinn/section10.rhtml

http://www.cliffsnotes.com/WileyCDA/LitNote/The-Adventures-of-Huckleberry-Finn-Summary-Analysis-and-Original-Text-by-Chapter-Chapters-25-26.id-20,pageNum-256.html

http://www.pinkmonkey.com/booknotes/monkeynotes/pmHuckFinn36.asp